The same handful of mistakes account for most tax clearance certificate problems we see referenced in filing guidance. None of them are complicated to avoid once you know to look for them.
Applying before checking your own three years first
A TCC reports on the three years of assessment before the current year. Applying without first checking that all three are filed and assessed is asking the tax office to find your problems for you, instead of finding them yourself in advance.
A five-minute check against your own filing history catches most gaps before they turn into a returned application. It is a small habit that saves a much longer wait later.
Searching for the old portal instead of Rev360
Old bookmarks and search results still point to TaxPro Max, which Rev360 replaced. Typing the old name into a search bar wastes time and sometimes lands on outdated guidance written before the switch. Update the bookmark once, and this stops being a recurring mistake for you and anyone else in the finance team.
A Tax ID that does not match the CAC record
This is one of the quieter mistakes, since nothing about it feels wrong until an application comes back flagged. If your CAC details have changed recently, a director, an address, an organisation type, check that the Tax ID lookup still reflects it before you apply. Our full guide to fixing this mismatch walks through the correction.
Skipping a nil return because nothing happened that month
A month with no sales still needed a VAT return, since due even if no business took place. Business owners often treat a quiet month as needing no paperwork, and that gap sits unnoticed until a TCC application surfaces it.
Filing a nil return takes very little effort compared with the delay of discovering the gap later. Treat every month the same way, whether or not anything was sold. A calendar reminder for the filing deadline works better than trying to remember which months were quiet.
Leaving renewal until January
A tax clearance certificate lapses on 31 December, not twelve months after you last renewed it. Waiting until January to start a fresh application means operating without a valid certificate for however long the new one takes. How to avoid your TCC expiring covers the lead-time habit that fixes this.
Checking your own application before you submit it
Most of these mistakes share one fix: check your own file before the tax office does. Our checklist of documents for a TCC application is built for exactly that. Once your file is ready, the tax clearance certificate page is where a vetted partner firm can take the application on, and our NRS tax hub covers Rev360 in more depth.