34 Pa. Code § 63.54 – Form UC-785.

(a) When an employer receives Form UC-785, Low Earnings Report, and regardless of whether he is liable for the payment of contributions, he shall complete the form and return it to the local public employment office:
1. (1) Within 4 days from the date on which the form is received, if the payroll period (which includes the last day of the week being used as a basis for a claim for partial or part-total unemployment) has ended and the data required is available.
2. (2) Within 4 days from the date when the payroll period (which includes the last day of the week being used as a basis for a claim for partial or part-total unemployment) has ended and the required data are available.
(b) The Bureau shall indicate the last day of the week on the form before sending it to the employer, and shall indicate by the wording and form as instructions for completing the form, the information which the employer is required to supply, and the manner in which it is to be supplied.