can we use multiple invoice series

For  GST Tax  Invoice  you have  to follow  Rule 46 of the CGST  rules 2017 

Yes, this should be allowed as per Rule 54(b)

"(b) a consecutive serial number not exceeding sixteen characters, in one or

multiple series, containing alphabets or numerals or special characters-
hyphen or dash and slash symbolised as “-” and “/” respectively, and any
combination thereof, unique for a financial year;"

Consult a CA for full clarification

I think  Rule  54(b) of  the CGST rule 2017  is  applicable  to ( Tax Invoice in special  case )  for   Input  service Distributor  please confirm