March salary received after 5 April: Which taxyear

In which month was it reported on an RTI submission?

If you don’t trust your accountant then get a new one, usually your accountant would help with these questions, that is why you pay them.

Your question doesn't really make things very clear.

Is after the 5th April the actual pay date or has your employer paid you late?

When you worked those hours you were paid for is not really relevant.

You could have been paid in April for hours worked in March, it's still the new tax year since its based on the payment date not working month.

If this is for your self assessment tax return you need to use your P60 for the tax year in question.

Or are you just trying to evade tax by artificially manipulating payment dates?

Asking such questions on a public forum is perhaps unwise.

I think this is a DIY limited company so there won’t be a P60.

And that's why your question makes no sense. You talk of adjusting a dividend but your question relates to pay date as in a salary.

I say again. Speak to your accountant. You clearly have no idea what your asking.

I understand what he is asking (now, not much effort went into the original post so he doesn’t really deserve any replies).

The date on the payslip is the relevant date.

You mean dividends from your old PSC? Again, have you not approached your accountant about shutting this down?

Apply the cash basis.

This time, you'd be right.... BUT WITH THE PROVISO that directors are treated as receiving salary at the earliest of various dates (labelled A to E, IIRC).

Your payment in April from the umbrella company will be classed as being in the tax year 2020/21.

ITEPA 2003, s 18 seems perfectly clear.