How to explain lack of 3 year Income Tax Return acknowledgement or Form 16A that is required?

I will be applying for a Schengen Visa in VFS Italy, and according to their website, we need to show Income Tax Return (ITR) acknowledgements or Form 16A of last 3 assessment years.

However, I only have Form 16A and ITR acknowledgement of 1 assessment year, as I was under the tax paying bracket before that, which means, I did not have to pay taxes, and therefore, didn’t get a Form 16 from my employers and didn’t file an ITR.

So, where and how can I explain this to the consulate? Will this be a problem?