Can AVC be dealt with using From 11 for income outside of PAYE

Can this be done by filling in the form 11 or do I need to go a roundabout way to do it ? I'm a PAYE employee and have extra income from rental say 10k profit so 52% owed to revenue. Anyone advise on how I go about this ? I have an employer pension I contribute to. Do I need to put the money in via payroll over a few months ?

Not quite what you're asking, but I don't think rental income counts as relevant pensionable income for AVC tax relief - typically you have to earn pensionable income from an occupation or trade.

Assuming your AVC is based solely on your employment income, you could do it separately from payroll and claim it back on Form 11. See Part 2 > Allowable Deductions Incurred in Employment > Pension Contribution Relief > Superannuation Contributions/AVC where not deducted by employer