My Confusion on Tax Return Deadline+ Tax Pay Date - both on Jan 31, 2023

Dear Sir/Madam, I decided to use an officially approved software (not paper form) to submit my tax return online. I understand that the deadline to file a tax return online is Jan 31, 2023. As well, I know that the final tax pay date is also fixed on Jan 31, 2023. My confusion is how do I know how much I should pay on Jan 31 if I filed a tax return on the same date. It seems that I cannot do the “two things” together on Jan 31, 2023. Or should I submit my tax return earlier in order not to clash the “tax pay date”? Appreciate your guidance and advice. Thanks and cheers I

Dear Sir/Madam, As deadline for tax return is approaching, any reply on the above? Thanks and regards

Hi KF,
When you submit your tax return online you would have an online calculation that would advise the balance due.
We would advise to submit the tax return as quickly as possible to allow time for you to make any payments due. 
Thank you.