AMENDMENT NO. 6 TO CAPITAL SUPPORT AGREEMENT

Exhibit 10.29.6

AMENDMENT NO. 6

TO

CAPITAL SUPPORT AGREEMENT

THIS AMENDMENT NO. 6 (the “Amendment”) to the Capital Support Agreement, effective as of the 31st day of March 2008 (the “Amendment Effective Date”), between SEI Liquid Asset Trust (the “Trust”) on behalf of its Prime Obligation Fund (the “Fund”) and SEI Investments Company (the “Support Provider”).

WHEREAS:

NOW THEREFORE, in consideration of the premises, covenants, representations and warranties contained herein and intending to be legally bound hereby, the parties hereto agree as follows:

“Maximum Contribution Amount” means nine million five hundred thousand dollars ($9,500,000).

“Segregated Account” means an account established by the Support Provider for the benefit of the Fund at a bank which is a qualified custodian under the 1940 Act, which may be an interest-bearing account and/or which account’s assets may be invested into money market instruments, and which during the term of the Agreement (i) shall hold cash or cash equivalent securities in an amount equal to six million five hundred thousand dollars ($6,500,000), and (ii) the assets of which shall be available to the Fund by means of ACH transfer initiated by the Fund without the requirement of further action or consent by the Support Provider; provided, however, that the amount required to be maintained in the Segregated Account may be reduced as set forth in Section 3 of the Agreement.

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IN WITNESS WHEREOF, the parties caused this Amendment No. 6 to the Capital Support Agreement to be executed and to become effective as of the date first written above.

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