Hi all I have recently ended my self employed work and claimed my last due payment for my services in July 2023. I have been working out my latest tax bill to be paid in January 2024 and it comes to... £4,409.79 This includes First payment on account for 2023-24. amount of £1,415.33 My questions are: Will the payment I made in Jan 2023 be deducted from this amount? ('First payment on account for tax year ending 05 Apr 2023 due 31st Jan 2023'). And also the payment I made in July 2023 for the same amount? ('Second payment on account for tax year ending 05 Apr 2023 due 31 Jul 2023')? Also is there anyway I can change the payment on account for 2023-24 as I was only self employed for 4 months of that year?