I just filled my tax return today online and everything else was fine but one.

In one of the field there I had to enter the last years tax return some number or code or pin something but I dint have any information from the last year so I just filled this is my first time tax return and skip that

is that will affect my tax return?

I did that because last year and the year before that I filled for tax but being student and dint work on campus and outside I dint have any tax return just filled it in university thats all.

Also if something goes wrong because of that Could I do it again later or I will get my money what I am supposed to get?

Thanks Appreciate your help