How do I use tabs and spaces? (how to resolve error TabError: inconsistent)

[Gribouillis]

It worked for me with Python 3.8, here is the output file (input file was ona.csv, output file is ona_2022.csv)

Output:
"Rekening","Datum","Omschrijving","Toelichting","Opname","Storting"
"NL00KNAB0000000000","06-05-2021","Siet et al AF74 B.V.","NL47RABSDFE64 AF74 B.V. iDEAL ","115,89","0"
"NL00KNAB0000000000","06-05-2021","","5775SDF39 Kees de Leeuw Ontvangen betaling ","0","150"
"NL00KNAB0000000000","03-05-2021","Hk E-Commerce","BE85739SDF55506 Alipay iDEAL ","1,85","0"
"NL00KNAB0000000000","20-04-2021","Aly EUROPE LTD S.A","BE85739SD55506 FS Services S.A. iDEAL ","3,39","0"