Update: 18 January

Further to the post last week alerting members to an issue with SA900 forms, HMRC has issued the following update:

‘In December 2017, we advised of an issue affecting a small number of SA900 forms filed electronically which resulted in some inaccurate calculations where there is a capital gain liability. The problem has now been resolved and calculations should now be correct for returns filed from 16 January 2018.

As previously advised, you should pay the tax that you calculated as being due by the payment deadline of 31 January. If you have already filed, your return will be checked and corrective action taken where necessary.’

Original blog:

STEP has been alerted by a member to an issue affecting the calculation of tax by HMRC of those who have submitted SA900 forms electronically. The issue was first spotted just before Christmas, when it appeared that the HMRC systems had been incorrectly calculating capital gains tax. The member was informed that the records would be amended within three working days.

Having contacted HMRC, STEP has been asked to disseminate the following message from HMRC to our members:

• We are aware of an issue affecting a small number of SA900 forms filed electronically. This is resulting in inaccurate calculations being issued in self-calculation cases where there is a capital gain liability. We are fixing this problem and expect it to be resolved very soon, and will update you when the matter has been resolved.

• If you have opted to self-calculate the liability due on your SA900, we ask you to use your self-calculated amount when you make a payment against your SA account by the due date.

• We are sorry for any inconvenience.

We will keep our members informed of progress.

Simon Hodges is Director of Policy at STEP.