Tax Rounding -Using P4008 /PTAAI

Dear All

We want to use tax calculation using P4008 /AAI -PT, in PO Voucher match its automatic calculate the tax and take in to respective GL Account define in as per AAI , but when we adjust the tax amount its not equal distribute in different GL Accounts, example given below ,we are working on JDE 9.1.4

Basic Amount     INR 11059.00

Tax calculated by system @ 18% INR 1990.62 ( Two Separate GL Account  -CGST and SGST 995.31 for each)

Tax amount manually adjusted to nearest rounding as INR 1990.00 ( Here it should equally distribute as 995.00 & 995.00 but is distribute as 995.31 in CGST and balance in SGST as 994.69)

Please guide how we can set this so system takes equally amount in both the GL.