See explanation below.
Explanation
Create a new requisition
* Go to Navigation pane > Modules Purchase requisitions > Purchase
requisitions prepared by me
* Select New.
* In the Name field, give the requisition a name.
* In the Requested date field, enter a date.
* In the Accounting date field, enter a date. Select
* In the Reason field, select an option from the drop-down menu. Select the reason.
* In the details field enter a more descriptive justification for the requisition.
Add a line to the requisition
* Select Add line. There are two ways of adding lines to thepurchase requisition. If you already know the product number or you already know that you are requesting a product that is not in the product catalog, then you can add the line directly with . The other way is to use Add products where you can usesearching and filtering to find items in the product catalog.
* Select the row you just created.
* In the Item number field, type a value. The items that are available for you to choose are limited by the category access policy and the procurement catalog forthe buying legal entity.
* In the Quantity field, enter a number.
Submit the requisition
* Select Workflow to open the drop dialog.
* Select Submit.
* Close the page.
* In the Comment field, type a note for the approver of the requisition.
* Select Submit.
* Close thepage.
* Refresh the page.
Reference:
https://docs.microsoft.com/en-us/dynamics365/supply-chain/procurement/tasks/create-requisition-consumption