You will be able to apply any available snap funds on your account to your local lifestyle plan within the manage plan section via the iOS app or snapkitchen.com.
To apply via iOS app:
select lifestyle plan
select week
select manage plan
select "yes" under "apply snap funds when available"
To apply via snapkitchen.com
select account
select manage plan
select week
select more options
select "yes" under "apply snap funds when available"
Please note, if you want the funds to apply to your upcoming week the change must be made at least 5 days prior to the start of your week.