Less refund is processed - Income Tax

Filed ITR 2 for my friend. Their taxable income is zero. They had one TDS and one TCS entry as per the 26as. Both of them did not reflect in the Schedule Taxes Paid section so while filing the return so we had to manually add them. The return got processed today and they have refunded the amount of TCS but have mentioned in the intimation letter that Form 26AS does not contain the TDS amount. How is this possible? - 26as https://imgur.com/a/JmQOP5C - Entered manually in the ITR form https://imgur.com/a/RslilS8 - Intimation https://imgur.com/a/eCDILpu https://imgur.com/a/vgC8E42 - This is how the TDS form was filled manually, please check the boxes https://imgur.com/a/ENZDWHQ - In the IT portal the tax credit mismatch sections shows this https://imgur.com/a/sJeJ15R Please note that it does not have the name of the deductor. In the schedule taxes paid section also, there is only TAN number of the deductor and not its name. Can this somehow have caused this issue? - Does Revision of return gets applicable to this case or Rectification of return? Within how much time do we need to file them? If rectification then under which option https://imgur.com/a/KDtCxgH ?? As per income tax's link https://www.incometax.gov.in/iec/foportal/help/e-filing-manage-tax-credit-mismatch-faq If you have not received an intimation u/s 143(1) , you can file a revised return; OR You can file a rectification request through Rectification request service. (Only if you have received an intimation u/s 143(1) In this case both intimation and refund has been received by the assessee. - TCS employees are also facing a similar issue, it seems that issue is at income tax s end https://www.moneycontrol.com/technology/tcs-india-employees-get-tax-demand-notices-company-asks-them-to-wait-before-paying-up-article-12820942.html What to do now? Thank You