I'm an F-1 student doing OPT, I put 2 for allowances on my W-4 the past year instead of 1, would that be a problem for my tax filing?

I'm in my 3rd year as F-1 student, and I'm 10 months in my OPT. When I submitted my W-4 form to my employer, I didn't know that I should put 1 for allowances, I recently found out about it when I was researching about tax return. I will file a new W-4 with my employer, but is it going to cause a problem for the past year's tax filing? How can I fix this error?