The methods for confirming the purchase of the first electronic invoice in Qingdao are as follows:

1. First, identify the QR code and download the mobile phone "Tax Pass" APP.

2. Before applying for invoice mailing, click the "+"sign in the upper right corner, and then switch to the status of "ticket collector" after logging in.

3. click the module of "mobile phone tax pass, home page, invoice mailing".

4. Maintain the address and choose the mailing method.

5. after clicking "confirm", continue to select the ticket counter and delivery address information, in which the delivery address defaults to the taxpayer's registered address and production and operation address, and you can add, modify and delete the invoice mailing address through the address maintenance function in the upper right corner of the page.

6. after clicking "confirm", the taxpayer can select the invoice type information, and the taxpayer can select one or more mailing invoice types at a time, in which "adding one line" can increase the invoice type, and "reducing one line" can decrease the invoice type.

7. After application, you can check the application status of invoices in the "Query, Invoice Mail Query" module of mobile phone tax service.