GST Return Filing Checklist for Calgary Businesses

Confirm the account and reporting period

Start with the legal name, business number, GST/HST program account, reporting period, filing frequency, due date, and payment date shown in the CRA account. Do not reuse another company's calendar or assume that every annual filer has the same deadline. A registrant may file monthly, quarterly, or annually, and annual deadlines differ depending on entity type, fiscal year end, and whether the individual has business income.

A registered business files a return for every reporting period, including a period with no sales, no tax collected, and no amount owing. If the business changed legal status, amalgamated, ceased operations, opened another account, or changed its fiscal year, confirm which account and period remain active before filing. Correct account selection prevents a valid payment from being applied to the wrong period.

Reconcile sales and tax collected

Reconcile line 101 revenue to the books, then explain permitted differences rather than forcing the figures to match. Compare the sales ledger, point of sale system, e commerce platforms, payment processors, deposits, and general ledger. Separate taxable, zero rated, exempt, and outside Canada supplies. Review credit notes, refunds, bad debt adjustments, deposits, foreign currency transactions, and related party transactions.

A Calgary address does not always mean the business charges 5% GST. Place of supply rules can require HST when goods are delivered or services are supplied in a participating province. Test tax codes by revenue stream and customer location, especially for online sales and remote services. Preserve the recipient address or delivery information used to support the rate.

Review input tax credits and adjustments

An input tax credit generally requires the business to be a registrant, acquire or import the property or service for use in commercial activities, and retain prescribed documentary information. Review the supplier's identity, transaction date, amount, GST/HST charged, recipient, and registration details required for the invoice value. Allocate mixed commercial and exempt or personal use rather than claiming the entire tax automatically.

Pay particular attention to passenger vehicles, meals and entertainment, home office or mixed use costs, employee reimbursements, capital property, imports, and purchases made before registration. Review unclaimed prior period ITCs within the applicable time limit and record why an amount is included now. Keep a schedule for every adjustment on lines other than ordinary tax collected and ITCs.

• Investigate unusual changes in effective tax rate or ITCs as a percentage of taxable sales.
• Resolve negative sales, duplicate invoices, and tax amounts without a supplier document.
• Reconcile the GST/HST control account before filing and again after the CRA assessment.
• Save the NETFILE or CRA account confirmation and proof of payment.
• Lock the filed period or document every later accounting change that affects it.

File electronically and close the period

CRA requires most GST/HST registrants to file electronically for periods ending in 2024 or later, with limited exceptions. Choose the electronic channel that fits the account and retain the confirmation number. Filing and payment are separate actions; a submitted return does not prove the payment was made or applied correctly.