Invitations to the Under-10 to Under-13 National Championships will be sent out later this month.
A supplementary rankings list will be produced by Wednesday April 19, from which the invitation lists will be taken.
This allows Table Tennis England to include results of more competitions played before March 31, and to scrutinise results already received to ensure the lists are accurate.
The U10-U13 Nationals take place on June 17-18 at Arena Sports Kettering. In the U10 and U11 categories up to 24 boys and 24 girls, including two wildcards in each gender, will be invited. In the U12 and U13 age groups, up to 48 boys and 48 girls will be invited, again including two wildcards.