Procedures in accomplishing the BIR Form No. 2551M
Steps
 Hint: Use tab to move to the next field
1
 Item 1 will be defaulted to either calendar/fiscal depending on your registered info in BIR. Item 2 will be editable only if you are a Fiscal filer. You must indicate your fiscal month by selecting the value under Item 2.
2
 Background information is automatically displayed. (Item 6 "TIN", Item 7 "RDO Code", Item 8 "Line of Business/Occupation", Item 9 "Taxpayer's Name", Item 10 "Telephone Number", Item 11 "Registered Address", Item 12 "Zip Code")
3
 Indicate if there are applicable Tax relief rates by changing the default value of Item 13 to Yes. Selecting yes will make if yes specify list mandatory. 
4
 Fill up Part II Computation of Tax by first selecting an ATC through the hyperlink. Clicking on this link will display an ATC-Industries Covered by Percentage Tax - Tax Rates list of values. Select applicable ATC value and click on Ok to populate the Main form with selected data.
5
 Taxable amount column will be enabled once an ATC is chosen. Supply the applicable amount. Tax due will be automatically computed based on the supplied Tax Rate value of the ATC selected. 
6
 Grayed out fields will be automatically computed after required fields are filled up or after clicking the validate button.
7
 Fill up Item 20A by clicking on the See Schedule 1 hyperlink. The main window will automatically scroll down to the Schedule 1Table. Indicate values for each row. Note that a row must be complete in order to properly validate the form and be accepted. Total Amount will be automatically computed and passed to Item 20A.
8
 The taxpayer can now attach supplementary documents by clicking on the Add Attachment button. A separate window will be displayed to facilitate the process. Attachments are done on a per file basis. 

Please note that the system currently accept files of the following format only: *.zip, *.xls, *.dat, *.csv. The taxpayer will be prompted if the file is not a valid format.

We do suggest that you upload your files in zip format to shorten the process.

9
 Review the data you have just encoded then click on verify to have an automated validation process. The taxpayer will be prompted if any problems were encountered. Otherwise, a successful validation will enable the Submit button. 
10
 Submit the form and wait for the FRN page to be displayed.