The process of submitting a 0619E form and a 1601EQ form is the same as the process to file other tax forms in Taxumo.

You simply click on the appropriate tax due card:

The cards that say "Monthly EWT Remittance" correspond to Form 0619E: 

The cards that say "Quarterly EWT Remittance" correspond to Form 1601EQ: 

Taxumo will automatically fill out the forms and show you a preview of the data.

Note that along with the Form 1601EQ, we'll generate the respective QAP (Quarterly Alphalist of Payees) and submit that along with your 1601EQ.
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Once confirmed, simply select the payment channel of your choice and proceed to payment.