Tax returns and self-assessment Tax Returns can be completed for... Individuals and sole traders; Partnerships; Limited Companies. The self-assessment regime is full of penalties and HMRC enquiry powers are extensive. It's important that... Returns are correctly completed; They are filed on time; All backup records are retained for the appropriate period of time. As well as the completion of your return we can assist with... Advice on your tax liabilities; Negotiating with the Collector if necessary; Identifying suitable tax planning opportunities; Completing all the necessary tax computations; Dealing with all correspondence from HMRC, taking the worry away from you.