How to File a GST34 Return

The return is rebuilt from a spreadsheet each quarter

Sales and input tax credits are pulled into a spreadsheet, adjusted, and typed into the CRA return. When a bill is posted late into the quarter, the spreadsheet and the ledger disagree.

After filing, nobody clears the output and input tax accounts. The balance grows each quarter, and the payment to the CRA has nothing to clear against.

A correction after filing is made by editing the old numbers. There is no record of what was first filed and what changed.

Why this happens

• The return is built outside the books, so late postings are missed.
• Adjustments and rebates are typed into the return but never posted.
• Output and input tax are never cleared to a payable account when the return is filed.
• A filed quarter stays open, so a later posting changes tax inside it.

Biznsbook addresses this through GST34 return lines, filing periods, the settlement journal when Accounting and Taxation are on. Sales, purchases, POS, Field Service, and Real Estate all ask the same tax engine, so the invoice, the return line, and the ledger read the same posted tax.

A second state, a reseller with a certificate, and a supplier that charged nothing are where a rate table drifts. Making Biznsbook the place that taxes the invoice, keeps the certificate, and builds the return keeps those on the same posted tax.

Step-by-step: File a GST34 Return

Written for owners, bookkeepers, and finance staff who charge and file sales tax, GST, HST, QST, or PST with Biznsbook Taxation. Biznsbook calculates and reports from your own setup. It does not give tax advice and does not file returns with a tax authority for you.

1. Create the filing period. Open Returns and create a period for the Canada Revenue Agency with the start and end dates of your reporting period. The Canada pack must be installed so the GST34 template is found for that authority.
2. Open the report. The report shows input, output and net from posted transactions, by tax point date. It covers sales, purchases and their returns, POS sales and refunds, vouchers, expense claims, landed cost, stock write-offs, price variances, fixed assets, Real Estate and Service Billing fees.
3. Read the calculated lines. Line 101 is sales taxed at GST or HST and line 103 the GST/HST collected. Line 106 is input tax credits. Lines 105, 108, 109, 112 and 113A to 113C are worked out from the lines before them.
4. Type the entered lines. Lines marked for entry, such as 104 and 107 adjustments, 110 instalments, 111 rebates, 205 tax on real property and 405 other self-assessed tax, can be typed and saved while the period is a draft.
5. Export for your filing. Export the period as PDF or Excel for your return or your adviser. Biznsbook does not file the return with the CRA. You file it through the CRA’s own channels.
6. Mark the period filed. This freezes the return lines and posts the settlement journal on the period’s last day: debit each output tax account, credit each recoverable input tax account, and net to Tax Payable. Entered figures post through Tax Clearing, where you book their other side.
7. Record the payment. When the period is filed and tax is still owed, record the bank payment, which clears Tax Payable. This needs the Create payments permission. If you find an error later, amend the period instead of editing it.

Review results after the first full filing period cycle. Adjust roles, mappings, or approvals where the same exception repeats.

Screen names in this guide match the Taxation tab bar in the product: Overview, Returns, Search, Settings, Packs, Rules, Local rates, Simulator, Registrations, Authorities, Components, Groups, Certificates, Nexus, 1099 / T4A, Provider, Checklist, Audit log, Approvals, and Guide. The tab bar only shows the tabs your permissions allow.

Common mistakes to avoid

• Mistake 1: The return is built outside the books, so late postings are missed. Repeating this each month usually shows up first in a return line that does not match the ledger, or tax charged in the wrong place.
• Mistake 2: Adjustments and rebates are typed into the return but never posted. Repeating this each month usually shows up first in a return line that does not match the ledger, or tax charged in the wrong place.
• Mistake 3: Output and input tax are never cleared to a payable account when the return is filed. Repeating this each month usually shows up first in a return line that does not match the ledger, or tax charged in the wrong place.
• Mistake 4: A filed quarter stays open, so a later posting changes tax inside it. Repeating this each month usually shows up first in a return line that does not match the ledger, or tax charged in the wrong place.

Note each recurring gap when you review the filing period. Each one should map to a step in this guide or an item on the compliance checklist.

Best practices that hold up as you scale

• Create the filing period — Open Returns and create a period for the Canada Revenue Agency with the start and end dates of your reporting period.
• Open the report — The report shows input, output and net from posted transactions, by tax point date.
• Read the calculated lines — Line 101 is sales taxed at GST or HST and line 103 the GST/HST collected.
• Type the entered lines — Lines marked for entry, such as 104 and 107 adjustments, 110 instalments, 111 rebates, 205 tax on real property and 405 other self-assessed tax, can be typed and saved while the period is a draft.
• Export for your filing — Export the period as PDF or Excel for your return or your adviser.

Teams that keep addresses complete, try a change in the Tax Simulator before switching it on, and file from the return lines rather than a side spreadsheet keep the invoice, the return, and the ledger in step.

How Biznsbook supports this workflow

GST34 return lines — part of Biznsbook Taxation, which sits on Accounting. Tax can come from tax groups, from jurisdiction rules installed by the Canada or US pack, or from your own Avalara AvaTax or TaxJar account. Whichever method you pick, posted tax lands on invoice tax lines that the dashboard, the return lines, and the settlement journal all read. Posted documents keep their tax when you change the setup later.

filing periods — part of Biznsbook Taxation, which sits on Accounting. Tax can come from tax groups, from jurisdiction rules installed by the Canada or US pack, or from your own Avalara AvaTax or TaxJar account. Whichever method you pick, posted tax lands on invoice tax lines that the dashboard, the return lines, and the settlement journal all read. Posted documents keep their tax when you change the setup later.

the settlement journal — part of Biznsbook Taxation, which sits on Accounting. Tax can come from tax groups, from jurisdiction rules installed by the Canada or US pack, or from your own Avalara AvaTax or TaxJar account. Whichever method you pick, posted tax lands on invoice tax lines that the dashboard, the return lines, and the settlement journal all read. Posted documents keep their tax when you change the setup later.

The Canada and US tax packs are drafts until a tax adviser reviews them, and rates and taxability must be checked for your business. Rates are effective-dated, and reinstalling a pack keeps rules you edited. Biznsbook prepares returns and contractor figures and exports them; it does not e-file, and it is not tax advice.

Suggested implementation timeline

1. Week 1: Complete the state or province and postal code on the company, warehouses, and customers, and install the country pack for the places you sell into.
2. Week 2: Record your registrations, set item tax categories, and try real sales and purchases in the Tax Simulator.
3. Week 3: Switch Tax Settings to jurisdiction rules, post a few real invoices and purchase bills, and check the tax on each.
4. Week 4: Create the first filing period, put GST34 return lines to work on real postings, review the return lines against posted tax, and export them for your adviser.
5. Ongoing: Each filing period, review the compliance checklist and the points under “The QST and PST returns work the same way” below.

Related guides

Start with charge sales tax by ship-to address, then charge GST, HST, QST and PST in Canada or file a state sales tax return.

Product page: Taxation. Hub: sales tax and GST guides. Decision: built-in sales tax rules vs Avalara or TaxJar.

What freezes when you file

Marking a period filed stores every return line as it stood, with the template it came from. Once a period is filed, no other posting can change tax in it. A posting that would change it is refused, which keeps the filed figures and the ledger in agreement.

Filing fails if no Tax Payable account is configured, and also when you entered figures but no Tax Clearing account exists. Set both up in Accounting before the first quarter you file.

Amendments without rewriting history

An amendment is a new draft built from current data. Your entered figures are copied across, so you change only what is wrong. Filing the amendment posts a settlement for the difference from the earlier settlement of the same authority and dates, not a second full settlement.

If filing reminders are on for the authority, users get weekly reminder emails for draft periods nearing due. With Automation licensed, a Tax Return Due event can start a workflow when a draft period ends within 7 days.

Metrics to track monthly

• Compliance checklist items by severity
• Exemption certificates expiring within 30 days or already expired
• States at or approaching their economic nexus threshold
• Draft filing periods close to their end date
• Recent sales to customers with no address, taxed at your own location

Start with three metrics; trend direction matters more than a single point-in-time snapshot.

Spreadsheet rate table vs Biznsbook Taxation

Compare a typical rate spreadsheet and manual return with the same work in Biznsbook Taxation.

The QST and PST returns work the same way

A filing period for Revenu Québec shows the QST return lines: supplies taxed at QST, QST collected, input tax refunds, adjustments to add and deduct, and net QST. A period for British Columbia, Saskatchewan or Manitoba shows sales taxed at PST or RST, the tax collected, tax due on purchases that you enter, commission, and the net due.

Write this into your filing routine, and revisit it when you register in a new province or state or change how tax is calculated.

Frequently asked questions

How this differs by industry