want return monthly to quarterly

By mistake i had chosen "NO" option for 2018-19 gst return where it says that ur monthly turnover was upto 1.5 cr in previous year or do you expect ur turonver in current year to be upto 1.5 cr. Now we have to file returns monthly but the turnover in the last year was less then 50 lacs and also in current year will be less then 50 lacs. Can i rectify this if possible and are there any consequences for selecting wrong option. 

Thanks 
 

Yes we have filed the return . Are there any consequences for chosing wrong option or we can continue to file monthly

Thank You. Feel a lot better now

If I Choose Monthly filing option by mistake and not filed any returns for this FY. Can I Change from monthly to quarterly?

Thanks in Advance.