I download info from pdfs, and then i write it in .xlsx. After that, to account this information in the accountant system, i do need to change .xlsx to csv. The issue is that the account number to use is composed of 12 digits. When I convert the file from xlsx to csv, the column with the account number change to 5,72E+11, instead of 572000000000, so the system is unable to read the file.