The changes you can make depends on the stage of your flat application:

Changes to	Stage of flat application
Changes to	During sales launch	After sales launch
Correspondence address, contact details or priority scheme request (if applicable)	You can log in to My Flat Dashboard to make the changes, if applicable.
Town or flat type applied for	You must cancel your existing flat application and re-apply online during the sales launch application period with the payment of an administrative fee of $10 (inclusive of GST).	You cannot change the town/ flat type you applied for.
Household particulars or financial circumstances	All details of the household in the flat application must be the same as the approved HFE letter. For any changes in household particulars or financial circumstances, such as income, you must cancel both your HFE letter and flat application, and re-start Step 1 of the HFE letter application i.e. the Preliminary HFE check. As an HFE letter application takes about a month to process after HDB receives all the required documents, you would not be able to apply for a flat in the ongoing sales launch.	Please contact us via MyRequest@HDB. If the changes render you ineligible to continue with the flat purchase, your flat application will be cancelled. The usual financial forfeitures and consequences for the cancellation will apply, depending on the stage of the application at the time of the cancellation.

Cancellation of flat application

Financial forfeitures and consequences for current and future applications apply when you cancel your flat application at various stages of the application.

Please note that once a flat application is cancelled, it cannot be reinstated. Read more on cancellation of flat application.

I am interested in more than 1 town or flat type. Can I submit more than 1 application in a sales launch?

Related questions

When is the next Build-To-Order (BTO), Sales of Balance Flats (SBF) sales exercise or open booking of flats?

Can I make changes to my flat application?

I intend to apply for two schemes namely, Restaurant and Catering in one premises. Do I submit one or two applications in LicenceOne?

Can I make multiple applications through different banks for the same Savings Bond issue? What will happen to my earlier requests? Will they be overwritten or superseded?