What should you do if your corporation files GST late in Canada?

If you’re dealing with a late GST filing for a corporation in Canada, the priority is to file it as soon as possible and make sure the numbers are actually correct. Rushing a return based on incomplete or messy books usually creates bigger problems than the delay itself.
Once it’s filed, look at why it was late. In most cases, it comes down to books not being current or unclear tax treatment during the period. Fix that upstream so the next filing is routine instead of a scramble.