When using our OQRS system to request your QSL cards, we have a tool for you to upload your ADIF which autofill’s the QSL request form. All you need from your log is a “Standard ADIF”
If you are using a logging software that exports between 60 to 100 fields in an ADIF this is NON standard.
If you are not familiar with ADIF (Amateur Data Interchange Format) then you can read more on here: http://www.adif.org/adif.html
So if you are not able to upload your ADIF to the tool, please just remove the non-standard fields and this will upload fine!
I highly recommend ADIF Master http://www.dxshell.com/adif-master.html for making amendments to logs and ADIF files.