GT_DLN - E-invoice Code - Excel template - receive

Dear All

Our customer wants to change from txt format to use the Excel format when down and uploading files. We have been receiving a Excel template to use, which is from the GTS. However the e-invoice Code is 20 CHAR - previously when we used TXT format we received an Invoice no-s which was 8 CHAR. This is updated in table IDGT-INFO Field GTVBELN but should we now update the E-invoice code in Field TYPECODE. Any other using the excel format who may provide some addtional information

Regards Lars