Basis period vs Accounting period.

My accounting period has always been October to September ever since I registered as self employed and has never caused any problems when filling in my tax return until this year. On page 1 of 2 of "Fill in your return" there is a check box for "My 'basis period' (the self-employed period for which I am taxable) is not the same as my accounting period" which I have ticked. As a consequence, on page 3 of "Fill in your return-Accounting details for xxxx" there is the question "Has your accounting date changed permanently" but it hasn't changed, it has always been the same. So - should I untick "my basis period is not he same as my accounting period" or should I tick "yes my accounting period has changed permanently"? Even though it hasn't.

Hi Barry Croucher,
Due to the introduction of making tax digital, your accountas will need to match the tax year going forward.
So yes your accounting date will be changed permanently
Please see here:
Basis period reform
Thank you. 

OK thanks for the info.