Brought forward balance of Prof Tax not appear in PTRC form

Hello Everyone.

Dear Sir,

While filing PRTC (Professional Tax) Returns on MahaGST site online (Form IIIB) for FY 25-26, Brought forward balance of last year is not shown in the form, that particular Box of b/f from last year balance is gray shaded with zero amount, this box is not editable. So how do we claim the brought forward balance of last year.

Please guide.