VAT Post Year End

Company year end is the 30.04.21 and the year end has been closed down. The VAT return is for the period February, March and April and is in the process of being reconciled post year end. I have just gone to post the journal and a warning has come up which states that I am about to post to before the current lock date of the 01.05.21. Do I wish to continue and post to a locked date?

I am having a brainstorm here and would appreciate any assistance. My feeling is that because this is a BS journal and not PL, it would be fine to post to prior to the lock date. Howerver, before I do so and create an issue, I just want to check.