I've noticed that I have not included one of the tax figures for a CIS Subcontractor in Aprils payment to HMRC (from yellow booklet for PAYE) so I have underpayed.
I rang HMRC who said to include him in the CIS return and to just ring the payment line to add him on. But I've already submitted everything for year end and manually added the tax figures for CIS so if I add him on the figures for year end will not match to the CIS Return and yellow booklet.
Don't worry. Keep it simple and to the minimum - you will have less problems.
I took on a new client last year, because his old accountant submitted everything and made a mess of it. Instead of making corrections, he resubmitted 2 times with different figures! I dealt with each problem separately, instead of in one go, as the HMRC just can't deal with it - its taken about 6 months, and now I'm at the last stage of arranging for the employee (only 1!) pay and tax paid records corrected with HMRC - they don't seem to make any effort to match up the payment records with the P35, P14 etc......
Sorry, hope you didn't think my post was aimed at you . My comment was aimed at VivianLaura. First you have PPI being mis-sold, then you have someone else on the bandwagon trying to get it back . Not sure if she(?) is selling PPI, or trying to recover it.