Two document sequences for AR invoice - Can it be done through DFF's

Summary

Two document sequences for AR invoice - Can it be done through DFF's

Content

Hi All,

There is a requirement to generated 2 document sequences for AR invoice. The regular document sequence and another sequence which is needed for tax purposes

e.g. Invoice running number AR123456 ,For this invoice , the corresponding tax invoice number is AR-TI45356 ( The range of numbers is provided by the tax department on a periodic basis)

Any ideas on how to do this , can we use DFF's to generate a sequence automatically

Note there should not be any manually selection by users to map the sequence numbers ,should be auto generated by the system on the same document